Ventilator



Aug. 1, 1944. K. s; CASTLE 2,354,795

I VENTILATOH Q Filed July 27, i942 I N VEN TOR. Ken/5 (0577a Patented Aug. 1, 1944 UNITED STATES PATENT OFFICE t M V 2354795 v VENTILATOR Kent S. Castle, San Francisco, Calif. 7 Application July 27, 1942; serial No. 452,378

ifioiaims. (c1. 9-8 -37) This invention relates in general to :ventilators and more particularly to a ventilator adapted-to be inserted in the porthole-of a vessel during. a

black out.

It is of, course always essential that: plenty: of

fresh air be delivered to the interior .ofa vessel, and at night time during a state of war this must be done without permittingthe emission of any light from the vessel. Although most vessels are provided on their decks with'ventilators, portholes are also. normally used for this purpose.

In general, the object of this invention is the provision of a simple but rugged light-proofventilator adapted to be inserted and secured 'within any standard porthole.

Another object of the invention is the provision of a porthole'ventilator formed with an insect screen and with means for draining off any water which may be entrapped therein. .J

The invention possesses other advantageous features, some of which with theforegoing will be set forth at length in the followi'ngdescription where that form of :the invention :which has been selected for illustration'in the drawing accompanying and forming a part'iofth'e' present specification is outlined in full. In said. drawing, one form of the invention-is shown,..but it is to be understood that it is not limited to such form,

since the invention as set forth in the claims may be embodied in a plurality of forms.

Referring to the drawing:

Figure 1 is an outer end elevation of a ventilator embodying the objects of my invention, as viewed externally of a vessel to which it is attached.

Figure 2 is a side elevation of the ventilator shown in Figure 1.

Figure 3 is an enlarged detailed cross-section taken on the line 3-3 of Figure 2.

Figure 4 is a vertical cross-section taken on the line 4--4 of Figure 3.

Figure 5 is a vertical cross-section taken on the line 5-5 of Figure 3.

Figure 6 is a perspective view of the central transverse baflie shown in Figure 3, and illustrates the manner in which this baffle is assembled with its supporting X-fins.

In general, my ventilator comprises a generally semicylindrical air scoop adapted to extend through a porthole and to the inner end of which is secured an inwardly flanged collar provided with an internal central transverse baflle. Secured to the outer end of the collar in spaced relation thereto is a second baffle which with the collar flanges and the internal baffle forms a tortuous path for the incoming air and an ei fe'ctive barrier to the outward passage of light.

As embodied in the various figures above described, my ventilator comprises a generally semicylindrical air scoop l arranged to slide through the fianged ring 2 of a porthole 3. If desired, the marginal edges of the scoop l may be bent back upon themselves as at 4 forthe'dual purpose of stiffening this member and producing a smooth edge. 1

. Immediately inside the ring 2, the scoop I is formed with an outwardly extending bead 5 which serves as a shoulder for engaging therin'g 2 and which forms an internal channel .6 .for'the reception of a resilient snap ring 1.. Disposed across the scoop l and secured thereto by means of the snap ring lisan insect screen 8. Extending through the bead 5 at both itstop' and bot"- tom. are drainage holes 9 through which any water intercepted by the screen can be drained.

Secured to the inner end of the scoop"! .is a collar H provided with inwardly extending flanges l2 and I3 which form a circular. channel. Welded within the collar ii is a pair of interlocked, right-angularly disposed,radially extending fins l4' and I5, respectively formed with aligned, transverselydisposedslots IB and Him .thereception of a central circular bafileJB. The diameter of the baffle .l8ishould 'of course be somewhat greater than theiinner diameter of the scoop and I5 and the bafiie *IBare assembledby providing thefin .Mwith a slot 19 forthe accommodation of half thewidth of the fin l5, and the fin I5 with a slot 2| for the accommodation of half the width of the fin M, in the manner of an egg carton filler. By means of this construction the two fins, even though interlocked, can be rotated about the slots I9 and 2| so as to lie substantially in a common plane as shown in Figure 6. With the fins in this position, the circular baflie I8 can be inserted into the transverse coplanar slots [6 and H. The fins are then rotated relative to each other about their common axis so as to lie at right angles with respect to each other, and in this position the fin and baflie assembly is welded to the collar H as shown in Figures 3 and 5. From this construction it will be noted that the fins serve both as a convenient means for locking and supporting the bafile l8 centrally with respect to the collar II in alignment with the scoop I, and for stiffening the collar.

Formed on the periphery of the collar H in line with the bottom and top of the fin l5 are As best showniin Figure 6, thefins l4" drainage outlets 22 and 23 through which any water accumulated in the collar may be drained. In this connection it is to be observed that my ventilator may be used on either the port or starboard sides of a vessel by simply rotating it on its own axis through 180 and that it is for this reason that diametrically opposed drainage outlets 22 and 23 and drainage holes 9 are provided.

Welded to theifins and I by means of laps 24 and 25 is a pair of outwardly'extending fins 26 and 21 interlocked at right angles with respect to each other in the same manner as described in connection with flns l4 and I5. The outer edges of the fins 26 and 21 are turned over at right angles to form feet or flanges 28 and 29, and welded to these flanges is a ba'file 3| having a diameter substantially equal to the outer diam-' eter of the collar l l. I As best shown in Figure 3, the inner edge of the flanges l3 and outer edge of the bafile 35 may be turned over on themselves for the purpose of forming atfinished edge and for stiflening these members. v

To hold the ventilatoras above describedin its operative position with its bead 5 in engagement with the portable ring 2,,a strap 32 is positioned over the baflle 3land bolted to'the plate 33 or other member forming the side of the vessel.

Although the effective operationof a ventilator of this type is not dependent upon specific dimensions, it should be noted that no cross-sectional area through'which' the incoming air travels in going'from the scoop intake to the outlet formed by the rear collar flange l3 and rear baffle 3|; should be less than the cross-sectional area of the cylindrical part; of the scoop. For example, the annular passageway defined by the cylindrical wall of the collar H and the peripheral edge of the innerbaflle l8 should not be less than the cross-sectional area of the scoop. Furthermore, it has been found that the inner baffle l8 should preferably .be. located midway between the collar flanges l2. and I3,and that the'distance between the. outer baflle'3l and the collar flange l3 should be substantially equal to the distance between the collar flange Bend the inner baflie l8.

Although my ventilator has been illustrated as of circular-cylindrical form, it may be of square or any other. cross-sectional form, and consequently the term cylindrical as herein used is to be construed as referring to any closed surface generated by a line moving parallel to itself I claim:

1. A porthole ventilator comprising: a collar formed with longitudinally spaced, inwardly extending front and rear flanges; an internal transverse baflle plate supported within said collar intermediate and partially overlying said flanges by a pair of crossed, interlocked fins secured to said collar; an external transverse baflle plate supported in longitudinally spaced relation with respect to and at leastrpartially overlying said rear flange j and an outwardly and longitudinally extendin generally cylindrical air scoop sealed to said front flange; said flanges and bafile plates forming a tortuous path over which air must pass in traveling through the ventilator.

2. A porthole ventilator comprising: a collar v formed with longitudinally spaced, inwardly extending front and rear flanges; an internal baflle plate supported within said collar intermediate and partially overlyin said flanges by means of a first pair of crossed, interlocked fins secured to said collar; an external transverse baffle plate supported in longitudinally spaced relation with respect to and at least partially overlying said rear flange by means of a second pair of crossed,

interlocked fins secured to and forming a con 3. A porthole ventilator comprising: a collar formed with longitudinally spaced, inwardly extending front and rear flanges; and an internal transverse bafile plate supported within said collar intermediateand partially overlying said flanges by a pair of crossed, interlocked fins secured to said collar.

4. A porthole ventilator comprising: a collar formed with longitudinally spaced, inwardly extending front and rear flanges; an internal transverse baflle plate supported intermediate and partially overlying said flanges; an external transverse bafile plate supported in longitudinally spacedrelation with respect to and at least partially overlying said rear flange; an outwardly and longitudinally extending, generally cylindrical air scoop sealed to said front flange; an out- .wardly extending peripheral bead formed on said air scoop and formed with an internal channel, said bead serving as a shoulder for engaging the frame of a porthole; and a screen disposed withintsaid air scoop with its edges secured within said channel.

KENT S. CASTLE. 

